Nozzle



Patented Jan. 21, 1941 UNITED STATES PATENT OFFICE Application June 7,1938, Serial No. 212,223

3 Claims.

This invention relates to an improvement in nozzle and, moreparticularly, to a nozzle adapt- `ed for the directional discharge underpressure of liquid carrying more or less solid matter in suspension.

The nozzle in accordance' with this invention is, due to its novelconstruction, adapted normally for the discharge of liquid carryingsolid matter without clogging, even when the concentration of solidmatter is relatively high and when the solid matter is of a fibrousnature or from its characteristics tends to mat or ball up. Again, dueto the novel structure of the nozzle, when clogging or partial cloggingoccurs, such may be readily and expeditiously relieved and the nozzlereturned to normal, without shutting off the nozzle or removal of any ofits parts.

The nozzle in accordance with this invention will lend itself to use forthe directional discharge of liquids generally carrying solids generallyin the form of a stream or spray and, due to its novel construction,will lend itself advantageously to use in a high heated atmosphere.Among the various uses for which the nozzle in accordance with thisinvention is adapted, it

has been found highly advantageous for use for discharging sewage sludgeinto a furnace or incinerator, since it normally will not become cloggedby the libres and other solids present in suspension in sewage sludge,and may be readily and expeditiously relieved if it does become clogged.It will compensate for the effects of wear caused by sand and gritpresent in sludge, and it may be placed in a furnace or incineratorwithout damage or loss of efficiency.

Having now indicated, in a general way, the nature and purpose of thisinvention, I will proceed to a detailed description of a preferredembodiment thereof with reference to the accompanying drawing in which:

Figure l is a cross-sectional view of a nozzle in accordance with thisinvention.

Figure 2 is a sectional view showing a detail of the structure of thenozzle shown in Figure l.

Figure 3 is a sectional View showing a modification in detail of thestructure of the nozzle shown in Figure 1. l

Referring more particularly to Figures l and 2, the reference characterI indicates a casing, desirably of cylindrical form, provided adjacentits rear end with a threaded aperture for its connection with a conduit2 adapted to conduct material, as sewage sludge, to be discharged. Theforward end of the casing is closed by a centrally apertured head 3,which is desirably threaded on the end of the casing. A nipple 4 isthreaded into the central aperture in the head 3 and its outer end isthreaded on extension 5 which serves to direct the stream or sprayissuing from the nipple. 5

The rear end of the casing is closed by a centrally apertured head S,which is desirably threaded on the casing. Threaded in the aperture inthe head 5 is an inner casing or tube 'l closed at its forward end by acentrally aper- 10 tured head 3. Within the casing or tube l, at itsforward end, and secured to the inner side of the head 8, as by Welding,is a fixed tubular member 9, the rear end of which is cut olf at anangle, as shown at lil. A rotatable tubular niem- 15 ber H extendswithin the casing l and its forward end, which is out off at an angle l2similar to that of the rear end of member Si, abuts against the rear endof member 9. The rear end of member Il extends without the casing and isprovided with handle members i3 whereby it may be revolved within thecasing '1,

The tubular member Il is closed adjacent its forward end by means of acentrally apertured partition I4, secured within the member, as by 25welding.

A valve or plug l5 is arranged to control discharge from vthe casing lthrough nipple 4. The valve I5 is secured by a nut 28 to a stem il,which extends through the nipple 4, the head 30 of casing 'l and thepartition lll into the revoluble member Il. A suitably packed stuffingbox 25 is provided to prevent leakage into the casing l along the valvestem il. The valve stem Il' is provided with stop members I8, adapt- 35ed to engage with the stuiiing box it to limit the closing movement ofthe valve and is threaded l from its free end as at I9. Within therevoluble member I! and surrounding the valve stem il is a spiral spring20, one end of which abuts o against the partition i4 and the other endof which abuts against an abutment 2|, adjustable by means of a nut 22threaded on the end of the stem IT.

Referring now more particularly to Figure 3, the nipple 4 is internallybeveled adjacent its discharge end, as shown at 23, and the valve I6,which is beveled on a less steep bevel, as shown at 24, seats on thebeveled surface 23 of the nipple on a line.

ln operation of the nozzle shown in Figures l and 2, the casing l isconnected to conduit 2, which leads from any pressure source of liquidcarrying solid matter in suspension, as for eX- ample, sewage sludge.Thus, the conduit 2 may 55 be connected to the discharge side of a pumpdrawing sewage sludge from a supply thereof.

The forward end of member II is adjusted with respect to the rear end ofmember 9, as shown in Figure 1, and the tension of spring 2l) isadjusted, by adjustment of nut 22, to permit desired opening of valve I5for discharge through the nipple 4 under the pressure obtaining incasing I and with consideration for the concentration and type of solidsin the liquid to be discharged. The shield 5 serves to guide the sternor spring from nipple 4 and prevent its spreading laterally In thenormal continued operation; of the nozzle as the concentration of solidsmay momentarily increase, or as the type of solids may result inagglomeration and a tendency to clog the discharge opening occurs, thepressure in casing I will necessarily rise, force the Valve I5 outwardlyagainst the spring 25, thus increasing the size of the dischargeopeningand permitting the passage of solid matter tending to clog thedischarge.

In the event that the discharge becomes clogged and relief is notafforded by the normal operation of valve I5, relief may beexpeditiously given by the mere rotation of member I I through a halfturn, which will bring the angular adjacent ends of members 9 and IItogether, permit the member I I to move forward under the influence ofspring 2l) and largely release the tension on the spring, thuspermitting the valve I5 to move out, for example, to the position shownin dotted lines, Figure 1, entirely clear of the nipple, and permit anysolid matter which may be clogging the discharge to be expelled underthe increased pressure in casing I.

As will now be observed, the angular ends of the members 9 and II act ascams permitting member II to be positioned to afford a fixed abutmentfor spring 20 under desired or normal operation of valve I5, as shown inFigures 1 and 2, and to be positioned, by merely turning it through themedium of handles I3, to release the tension on the spring.

When the modification shown in Figure 3 is used, the internal bevel 23on the nipple I and the less steep bevel 24 on the valve I6 will insurethat the valve may be properly adjusted to give required opening despiteinevitable wear from sand and grit in the liquid, as sewage sludge,discharged. The modiiication shown in Figure 3 may be provided with ashield such as the shield 5 shown in Figure l.

The nozzle, when used for the burning of sewage sludge, or the like, maybe placed under high temperature conditions, as in a furnace,withdescription of a preferred embodiment of this invention is forillustrative purposes and that it is not inten-ded that this inventionshall be limited thereby, since various modiiication in detail may bemade without departing from the scope of the invention.

What I claim and desire to protect by Letters Patent is:

1. A nozzle comprising, in combination, a casing having a dischargeopening in its forward end and an inlet opening, a valve arranged tocontrol the said discharge opening, a stem on said valve extendingrearwardly within said casing, a spring embracing said valve stem andadapted to control said valve, a fixed cam member embracing said valvestem, a rotatable longitudinally movable cam member embracing said valvestem and adapted to cooperate with said Xed cam member, an abutment forone end of said spring carried by said rotatable cam member, anadjustable abutment for the other end of said spring carried by saidvalve stem and means to rotate said rotatable cam member relative tosaid fixed cam member to vary the tension on said spring.

2. A nozzle comprising, in combination, a casing having a dischargeopening in its forward end and an inlet opening, a valve arranged tocontrol the said discharge opening, a stern on said valve extendingrearwardly within said casing, a spring embracing said valve stem andadapted to control said valve, an inner casing within said rst mentionedcasing arranged to cover said spring, a Xed cam member positioned withinsaid inner casing, a rotatable cam meml ber extending within said casingand adapted to cooperate with said fixed cam member, an abutment for oneend of said spring carried by said rotatable cam member and anadjustable abutment for the other end of said spring carried by saidvalve stem.

3. A nozzle comprising, in combination, a casing having a discharge`opening in its forward end and an inlet opening, a valve arranged tocontrol the said discharge opening, a stem on said valve extendingrearwardly within said casing, a spring embracing said valve stem, anabutment for said spring carried by the valve stem, and a secondabutment for said spring movable relative to the abutment on the valvestem, a

pair of cooperating members adjacent to and engaging each other at theirsurfaces, said members each having a cut-away portion at the engagingsurface, one of said members being carried on said second abutment forsaid spring, and said members being relatively movable toward and awayfrom each other and adapted in one relative position to maintain tensionon said spring, whereby it will control said valve and in anotherrelative position to release tension on said spring, and means formoving one of said members relative to the other.

FRANK R. MAXWELL.

